<template>
  <a-table :columns="columns" :data-source="data" bordered >
    <template
      v-for="(col,index) in editColums"
      :slot="col"
      slot-scope="text, record, index"
    >
      <div :key="index">
        <a-input
          v-if="record.editable"
          style="margin: -5px 0"
          :value="text"
          @change="e => handleChange(e.target.value, record.key, col)"
        />
        <template v-else>
          {{ text }}
        </template>
      </div>
    </template>

    <template slot="operation" slot-scope="text, record, index">
      <div class="editable-row-operations">
        <span v-if="record.editable">
          <a @click="save(record.key)">保存</a>
          <a-popconfirm title="Sure to cancel?" @confirm="cancel(record.key)">
            <a>取消</a>
          </a-popconfirm>
        </span>
        
        <span v-else>
          <a :disabled="editingKey !== ''" @click="edit(record.key)">编辑</a>
        </span>
      </div>
    </template>
  </a-table>
</template>
<script>
const editColums = ['name', 'age', 'address']
const columns = [
  {
    title: '#',
    dataIndex: 'index',
    // width: '15%',
  },
  {
    title: 'name',
    dataIndex: 'name',
    scopedSlots: { customRender: 'name' },
  },
  {
    title: 'age',
    dataIndex: 'age',
    scopedSlots: { customRender: 'age' },
  },
  {
    title: 'address',
    dataIndex: 'address',
    scopedSlots: { customRender: 'address' },
  },
  {
    title: 'operation',
    dataIndex: 'operation',
    scopedSlots: { customRender: 'operation' },
  },
];

const data = [];
for (let i = 0; i < 100; i++) {
  data.push({
    index: i+1,
    key: i.toString(),
    name: `Edrward ${i}`,
    age: 32,
    address: `London Park no. ${i}`,
  });
}
export default {
  data() {
    this.cacheData = data.map(item => ({ ...item }));
    return {
      data,
      columns,
      editingKey: '',
      editColums,
    };
  },
  methods: {
    handleChange(value, key, column) {
      const newData = [...this.data];
      const target = newData.find(item => key === item.key);
      if (target) {
        target[column] = value;
        this.data = newData;
      }
    },
    edit(key) {
      const newData = [...this.data];
      const target = newData.find(item => key === item.key);
      this.editingKey = key;
      if (target) {
        target.editable = true;
        this.data = newData;
      }
    },
    save(key) {
      const newData = [...this.data];
      const newCacheData = [...this.cacheData];
      const target = newData.find(item => key === item.key);
      const targetCache = newCacheData.find(item => key === item.key);
      if (target && targetCache) {
        delete target.editable;
        this.data = newData;
        Object.assign(targetCache, target);
        this.cacheData = newCacheData;
      }
      this.editingKey = '';
    },
    cancel(key) {
      const newData = [...this.data];
      const target = newData.find(item => key === item.key);
      this.editingKey = '';
      if (target) {
        Object.assign(target, this.cacheData.find(item => key === item.key));
        delete target.editable;
        this.data = newData;
      }
    },
  },
};
</script>
<style scoped>
.editable-row-operations a {
  margin-right: 8px;
}
</style>